The term Aurochs refers to an extinct species of large wild cattle that once roamed Europe, Asia, and North Africa. It is also known by its scientific name, 'Bos primigenius'. The term Aurochs can be broken down into four crossword solutions: URUS (4 letters), OXEN (4 letters), BISON (5 letters), and BUFFALO (7 letters). URUS and OXEN refer to the same species, while BISON and BUFFALO are related species. All four terms are used to describe large, wild bovines.